Actress Natalie Wood's death certificate has been changed to reflect some of the uncertainties and lingering questions surrounding the actress' drowning more than 30 years ago in the Pacific Ocean off Southern California.

The document was amended earlier this month and shifts Wood's death from an accidental drowning to "drowning and other undetermined factors.

The amended document also now states that the circumstances of how Wood ended up in the waters off Catalina Island in November 1981 are "not clearly established."